Structured Command History for UNIX Using a Parallel Distributed Processing Model.

摘要

This thesis investigates the use of a structured history to assist users in recalling previously entered complex UNIX commands. A structured history is a database of commands that were previously entered. Two models are presented: the first model uses a conventional database and the second model uses a parallel distributed processing system. The conventional database system can recall commands by pattern matching based on command name, pattern matching on command options, frequency of use, and relative time. A simple prototype, created using the Emacs environment, was useful in recalling previously entered UNIX commands. The parallel distributed processing system stores UNIX commands by decomposing them into two character sequences called bigrams. A prototype implementation used a two layer network, in which each unit represents a bigram. The implementation showed features such as spelling correction and associated command recall. The ability to recall a list of commands satisfying a particular criteria is among the advantages of a structured history. 19 refs., 8 figs., 1 tab. (ERA citation 14:030213)